Do not underestimate the effects of compulsive thoughts or actions. At its mild form, it can cause physical problems such as insomnia; at its severe form, it can bring mood disorders such as depression, anxiety, or delusional disorder etc. If not treated early, it may lead to mental imbalance or even more serious mental illnesses. There is a small test below that can help you assess whether you have any tendency of obsessive-compulsive disorder. However, this is just a simple test and does not serve for medical diagnosis.